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libssh2.h
408 lines (339 loc) · 21.3 KB
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libssh2.h
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/* Copyright (c) 2004-2006, Sara Golemon <sarag@libssh2.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms,
* with or without modification, are permitted provided
* that the following conditions are met:
*
* Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* Neither the name of the copyright holder nor the names
* of any other contributors may be used to endorse or
* promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*/
#ifndef LIBSSH2_H
#define LIBSSH2_H 1
#ifdef __cplusplus
extern "C" {
#endif
#include <stddef.h>
#include <string.h>
#include <sys/stat.h>
/* Allow alternate API prefix from CFLAGS or calling app */
#ifndef LIBSSH2_API
# ifdef LIBSSH2_WIN32
# ifdef LIBSSH2_LIBRARY
# define LIBSSH2_API __declspec(dllexport)
# else
# define LIBSSH2_API __declspec(dllimport)
# endif /* LIBSSH2_LIBRARY */
# else /* !LIBSSH2_WIN32 */
# define LIBSSH2_API
# endif /* LIBSSH2_WIN32 */
#endif /* LIBSSH2_API */
#if defined(LIBSSH2_DARWIN) || (defined(LIBSSH2_WIN32) && !defined(_MSC_VER))
# include <sys/uio.h>
#endif
#if defined(LIBSSH2_WIN32) && _MSC_VER < 1300
typedef unsigned __int64 libssh2_uint64_t;
typedef __int64 libssh2_int64_t;
#else
typedef unsigned long long libssh2_uint64_t;
typedef long long libssh2_int64_t;
#endif
#define LIBSSH2_VERSION "0.14"
#define LIBSSH2_APINO 200507211326
/* Part of every banner, user specified or not */
#define LIBSSH2_SSH_BANNER "SSH-2.0-libssh2_" LIBSSH2_VERSION
/* We *could* add a comment here if we so chose */
#define LIBSSH2_SSH_DEFAULT_BANNER LIBSSH2_SSH_BANNER
#define LIBSSH2_SSH_DEFAULT_BANNER_WITH_CRLF LIBSSH2_SSH_DEFAULT_BANNER "\r\n"
/* Default generate and safe prime sizes for diffie-hellman-group-exchange-sha1 */
#define LIBSSH2_DH_GEX_MINGROUP 1024
#define LIBSSH2_DH_GEX_OPTGROUP 1536
#define LIBSSH2_DH_GEX_MAXGROUP 2048
/* Defaults for pty requests */
#define LIBSSH2_TERM_WIDTH 80
#define LIBSSH2_TERM_HEIGHT 24
#define LIBSSH2_TERM_WIDTH_PX 0
#define LIBSSH2_TERM_HEIGHT_PX 0
/* 1/4 second */
#define LIBSSH2_SOCKET_POLL_UDELAY 250000
/* 0.25 * 120 == 30 seconds */
#define LIBSSH2_SOCKET_POLL_MAXLOOPS 120
/* Maximum size to allow a payload to compress to, plays it safe by falling short of spec limits */
#define LIBSSH2_PACKET_MAXCOMP 32000
/* Maximum size to allow a payload to deccompress to, plays it safe by allowing more than spec requires */
#define LIBSSH2_PACKET_MAXDECOMP 40000
/* Maximum size for an inbound compressed payload, plays it safe by overshooting spec limits */
#define LIBSSH2_PACKET_MAXPAYLOAD 40000
/* Malloc callbacks */
#define LIBSSH2_ALLOC_FUNC(name) void *name(size_t count, void **abstract)
#define LIBSSH2_REALLOC_FUNC(name) void *name(void *ptr, size_t count, void **abstract)
#define LIBSSH2_FREE_FUNC(name) void name(void *ptr, void **abstract)
typedef struct _LIBSSH2_USERAUTH_KBDINT_PROMPT
{
char* text;
unsigned int length;
unsigned char echo;
} LIBSSH2_USERAUTH_KBDINT_PROMPT;
typedef struct _LIBSSH2_USERAUTH_KBDINT_RESPONSE
{
char* text;
unsigned int length;
} LIBSSH2_USERAUTH_KBDINT_RESPONSE;
/* 'keyboard-interactive' authentication callback */
#define LIBSSH2_USERAUTH_KBDINT_RESPONSE_FUNC(name_) void name_(const char* name, int name_len, const char* instruction, int instruction_len, int num_prompts, const LIBSSH2_USERAUTH_KBDINT_PROMPT* prompts, LIBSSH2_USERAUTH_KBDINT_RESPONSE* responses, void **abstract)
/* Callbacks for reading and writing to a custom stream */
#define LIBSSH2_WRITE_FUNC(name) int name(uint8_t *buffer, int length, LIBSSH2_SESSION *session, void *userInfo)
#define LIBSSH2_READ_FUNC(name) int name(uint8_t *buffer, int length, LIBSSH2_SESSION *session, void *userInfo)
/* Callbacks for special SSH packets */
#define LIBSSH2_IGNORE_FUNC(name) void name(LIBSSH2_SESSION *session, const char *message, int message_len, void **abstract)
#define LIBSSH2_DEBUG_FUNC(name) void name(LIBSSH2_SESSION *session, int always_display, const char *message, int message_len, const char *language, int language_len,void **abstract)
#define LIBSSH2_DISCONNECT_FUNC(name) void name(LIBSSH2_SESSION *session, int reason, const char *message, int message_len, const char *language, int language_len, void **abstract)
#define LIBSSH2_PASSWD_CHANGEREQ_FUNC(name) void name(LIBSSH2_SESSION *session, char **newpw, int *newpw_len, void **abstract)
#define LIBSSH2_MACERROR_FUNC(name) int name(LIBSSH2_SESSION *session, const char *packet, int packet_len, void **abstract)
#define LIBSSH2_X11_OPEN_FUNC(name) void name(LIBSSH2_SESSION *session, LIBSSH2_CHANNEL *channel, char *shost, int sport, void **abstract)
#define LIBSSH2_CHANNEL_CLOSE_FUNC(name) void name(LIBSSH2_SESSION *session, void **session_abstract, LIBSSH2_CHANNEL *channel, void **channel_abstract)
/* libssh2_session_callback_set() constants */
#define LIBSSH2_CALLBACK_IGNORE 0
#define LIBSSH2_CALLBACK_DEBUG 1
#define LIBSSH2_CALLBACK_DISCONNECT 2
#define LIBSSH2_CALLBACK_MACERROR 3
#define LIBSSH2_CALLBACK_X11 4
/* libssh2_session_method_pref() constants */
#define LIBSSH2_METHOD_KEX 0
#define LIBSSH2_METHOD_HOSTKEY 1
#define LIBSSH2_METHOD_CRYPT_CS 2
#define LIBSSH2_METHOD_CRYPT_SC 3
#define LIBSSH2_METHOD_MAC_CS 4
#define LIBSSH2_METHOD_MAC_SC 5
#define LIBSSH2_METHOD_COMP_CS 6
#define LIBSSH2_METHOD_COMP_SC 7
#define LIBSSH2_METHOD_LANG_CS 8
#define LIBSSH2_METHOD_LANG_SC 9
/* session.flags bits */
#define LIBSSH2_FLAG_SIGPIPE 0x00000001
typedef struct _LIBSSH2_SESSION LIBSSH2_SESSION;
typedef struct _LIBSSH2_CHANNEL LIBSSH2_CHANNEL;
typedef struct _LIBSSH2_LISTENER LIBSSH2_LISTENER;
typedef struct _LIBSSH2_POLLFD {
unsigned char type; /* LIBSSH2_POLLFD_* below */
union {
int socket; /* File descriptors -- examined with system select() call */
LIBSSH2_CHANNEL *channel; /* Examined by checking internal state */
LIBSSH2_LISTENER *listener; /* Read polls only -- are inbound connections waiting to be accepted? */
} fd;
unsigned long events; /* Requested Events */
unsigned long revents; /* Returned Events */
} LIBSSH2_POLLFD;
/* Poll FD Descriptor Types */
#define LIBSSH2_POLLFD_SOCKET 1
#define LIBSSH2_POLLFD_CHANNEL 2
#define LIBSSH2_POLLFD_LISTENER 3
/* Note: Win32 Doesn't actually have a poll() implementation, so some of these values are faked with select() data */
/* Poll FD events/revents -- Match sys/poll.h where possible */
#define LIBSSH2_POLLFD_POLLIN 0x0001 /* Data available to be read or connection available -- All */
#define LIBSSH2_POLLFD_POLLPRI 0x0002 /* Priority data available to be read -- Socket only */
#define LIBSSH2_POLLFD_POLLEXT 0x0002 /* Extended data available to be read -- Channel only */
#define LIBSSH2_POLLFD_POLLOUT 0x0004 /* Can may be written -- Socket/Channel */
/* revents only */
#define LIBSSH2_POLLFD_POLLERR 0x0008 /* Error Condition -- Socket */
#define LIBSSH2_POLLFD_POLLHUP 0x0010 /* HangUp/EOF -- Socket */
#define LIBSSH2_POLLFD_SESSION_CLOSED 0x0010 /* Session Disconnect */
#define LIBSSH2_POLLFD_POLLNVAL 0x0020 /* Invalid request -- Socket Only */
#define LIBSSH2_POLLFD_POLLEX 0x0040 /* Exception Condition -- Socket/Win32 */
#define LIBSSH2_POLLFD_CHANNEL_CLOSED 0x0080 /* Channel Disconnect */
#define LIBSSH2_POLLFD_LISTENER_CLOSED 0x0080 /* Listener Disconnect */
/* Hash Types */
#define LIBSSH2_HOSTKEY_HASH_MD5 1
#define LIBSSH2_HOSTKEY_HASH_SHA1 2
/* Disconnect Codes (defined by SSH protocol) */
#define SSH_DISCONNECT_HOST_NOT_ALLOWED_TO_CONNECT 1
#define SSH_DISCONNECT_PROTOCOL_ERROR 2
#define SSH_DISCONNECT_KEY_EXCHANGE_FAILED 3
#define SSH_DISCONNECT_RESERVED 4
#define SSH_DISCONNECT_MAC_ERROR 5
#define SSH_DISCONNECT_COMPRESSION_ERROR 6
#define SSH_DISCONNECT_SERVICE_NOT_AVAILABLE 7
#define SSH_DISCONNECT_PROTOCOL_VERSION_NOT_SUPPORTED 8
#define SSH_DISCONNECT_HOST_KEY_NOT_VERIFIABLE 9
#define SSH_DISCONNECT_CONNECTION_LOST 10
#define SSH_DISCONNECT_BY_APPLICATION 11
#define SSH_DISCONNECT_TOO_MANY_CONNECTIONS 12
#define SSH_DISCONNECT_AUTH_CANCELLED_BY_USER 13
#define SSH_DISCONNECT_NO_MORE_AUTH_METHODS_AVAILABLE 14
#define SSH_DISCONNECT_ILLEGAL_USER_NAME 15
/* Error Codes (defined by libssh2) */
#define LIBSSH2_ERROR_SOCKET_NONE -1
#define LIBSSH2_ERROR_BANNER_NONE -2
#define LIBSSH2_ERROR_BANNER_SEND -3
#define LIBSSH2_ERROR_INVALID_MAC -4
#define LIBSSH2_ERROR_KEX_FAILURE -5
#define LIBSSH2_ERROR_ALLOC -6
#define LIBSSH2_ERROR_SOCKET_SEND -7
#define LIBSSH2_ERROR_KEY_EXCHANGE_FAILURE -8
#define LIBSSH2_ERROR_TIMEOUT -9
#define LIBSSH2_ERROR_HOSTKEY_INIT -10
#define LIBSSH2_ERROR_HOSTKEY_SIGN -11
#define LIBSSH2_ERROR_DECRYPT -12
#define LIBSSH2_ERROR_SOCKET_DISCONNECT -13
#define LIBSSH2_ERROR_PROTO -14
#define LIBSSH2_ERROR_PASSWORD_EXPIRED -15
#define LIBSSH2_ERROR_FILE -16
#define LIBSSH2_ERROR_METHOD_NONE -17
#define LIBSSH2_ERROR_PUBLICKEY_UNRECOGNIZED -18
#define LIBSSH2_ERROR_PUBLICKEY_UNVERIFIED -19
#define LIBSSH2_ERROR_CHANNEL_OUTOFORDER -20
#define LIBSSH2_ERROR_CHANNEL_FAILURE -21
#define LIBSSH2_ERROR_CHANNEL_REQUEST_DENIED -22
#define LIBSSH2_ERROR_CHANNEL_UNKNOWN -23
#define LIBSSH2_ERROR_CHANNEL_WINDOW_EXCEEDED -24
#define LIBSSH2_ERROR_CHANNEL_PACKET_EXCEEDED -25
#define LIBSSH2_ERROR_CHANNEL_CLOSED -26
#define LIBSSH2_ERROR_CHANNEL_EOF_SENT -27
#define LIBSSH2_ERROR_SCP_PROTOCOL -28
#define LIBSSH2_ERROR_ZLIB -29
#define LIBSSH2_ERROR_SOCKET_TIMEOUT -30
#define LIBSSH2_ERROR_SFTP_PROTOCOL -31
#define LIBSSH2_ERROR_REQUEST_DENIED -32
#define LIBSSH2_ERROR_METHOD_NOT_SUPPORTED -33
#define LIBSSH2_ERROR_INVAL -34
#define LIBSSH2_ERROR_INVALID_POLL_TYPE -35
#define LIBSSH2_ERROR_PUBLICKEY_PROTOCOL -36
/* Session API */
LIBSSH2_API LIBSSH2_SESSION *libssh2_session_init_ex(LIBSSH2_ALLOC_FUNC((*my_alloc)), LIBSSH2_FREE_FUNC((*my_free)), LIBSSH2_REALLOC_FUNC((*my_realloc)), void *abstract);
#define libssh2_session_init() libssh2_session_init_ex(NULL, NULL, NULL, NULL)
LIBSSH2_API void **libssh2_session_abstract(LIBSSH2_SESSION *session);
/* Custom Read/Write functors */
LIBSSH2_API void libssh2_session_set_user_info(LIBSSH2_SESSION *session, void *ui);
LIBSSH2_API void libssh2_session_set_write(LIBSSH2_SESSION *session, void *callback);
LIBSSH2_API void libssh2_session_set_read(LIBSSH2_SESSION *session, void *callback);
LIBSSH2_API void *libssh2_session_callback_set(LIBSSH2_SESSION *session, int cbtype, void *callback);
LIBSSH2_API int libssh2_banner_set(LIBSSH2_SESSION *session, const char *banner);
LIBSSH2_API int libssh2_session_startup(LIBSSH2_SESSION *session, int socket);
LIBSSH2_API int libssh2_session_disconnect_ex(LIBSSH2_SESSION *session, int reason, const char *description, const char *lang);
#define libssh2_session_disconnect(session, description) libssh2_session_disconnect_ex((session), SSH_DISCONNECT_BY_APPLICATION, (description), "")
LIBSSH2_API void libssh2_session_free(LIBSSH2_SESSION *session);
LIBSSH2_API const char *libssh2_hostkey_hash(LIBSSH2_SESSION *session, int hash_type);
LIBSSH2_API int libssh2_session_method_pref(LIBSSH2_SESSION *session, int method_type, const char *prefs);
LIBSSH2_API const char *libssh2_session_methods(LIBSSH2_SESSION *session, int method_type);
LIBSSH2_API int libssh2_session_last_error(LIBSSH2_SESSION *session, char **errmsg, int *errmsg_len, int want_buf);
LIBSSH2_API int libssh2_session_flag(LIBSSH2_SESSION *session, int flag, int value);
/* Userauth API */
LIBSSH2_API char *libssh2_userauth_list(LIBSSH2_SESSION *session, const char *username, unsigned int username_len);
LIBSSH2_API int libssh2_userauth_authenticated(LIBSSH2_SESSION *session);
LIBSSH2_API int libssh2_userauth_password_ex(LIBSSH2_SESSION *session, const char *username, unsigned int username_len, const char *password, unsigned int password_len, LIBSSH2_PASSWD_CHANGEREQ_FUNC((*passwd_change_cb)));
#define libssh2_userauth_password(session, username, password) libssh2_userauth_password_ex((session), (username), strlen(username), (password), strlen(password), NULL)
LIBSSH2_API int libssh2_userauth_publickey_fromfile_ex(LIBSSH2_SESSION *session, const char *username, unsigned int username_len,
const char *publickey, const char *privatekey,
const char *passphrase);
#define libssh2_userauth_publickey_fromfile(session, username, publickey, privatekey, passphrase) \
libssh2_userauth_publickey_fromfile_ex((session), (username), strlen(username), (publickey), (privatekey), (passphrase))
LIBSSH2_API int libssh2_userauth_hostbased_fromfile_ex(LIBSSH2_SESSION *session, const char *username, unsigned int username_len,
const char *publickey, const char *privatekey,
const char *passphrase,
const char *hostname, unsigned int hostname_len,
const char *local_username, unsigned int local_username_len);
#define libssh2_userauth_hostbased_fromfile(session, username, publickey, privatekey, passphrase, hostname) \
libssh2_userauth_hostbased_fromfile_ex((session), (username), strlen(username), (publickey), (privatekey), (passphrase), (hostname), strlen(hostname), (username), strlen(username))
/*
* response_callback is provided with filled by library prompts array,
* but client must allocate and fill individual responses. Responses
* array is already allocated. Responses data will be freed by libssh2
* after callback return, but before subsequent callback invokation.
*/
LIBSSH2_API int libssh2_userauth_keyboard_interactive_ex(LIBSSH2_SESSION* session, const char *username, unsigned int username_len,
LIBSSH2_USERAUTH_KBDINT_RESPONSE_FUNC((*response_callback)));
#define libssh2_userauth_keyboard_interactive(session, username, response_callback) \
libssh2_userauth_keyboard_interactive_ex((session), (username), strlen(username), (response_callback))
LIBSSH2_API int libssh2_poll(LIBSSH2_POLLFD *fds, unsigned int nfds, long timeout);
/* Channel API */
#define LIBSSH2_CHANNEL_WINDOW_DEFAULT 65536
#define LIBSSH2_CHANNEL_PACKET_DEFAULT 16384
#define LIBSSH2_CHANNEL_MINADJUST 1024
/* Extended Data Handling */
#define LIBSSH2_CHANNEL_EXTENDED_DATA_NORMAL 0
#define LIBSSH2_CHANNEL_EXTENDED_DATA_IGNORE 1
#define LIBSSH2_CHANNEL_EXTENDED_DATA_MERGE 2
#define SSH_EXTENDED_DATA_STDERR 1
LIBSSH2_API LIBSSH2_CHANNEL *libssh2_channel_open_ex(LIBSSH2_SESSION *session, const char *channel_type, unsigned int channel_type_len, unsigned int window_size, unsigned int packet_size, const char *message, unsigned int message_len);
#define libssh2_channel_open_session(session) libssh2_channel_open_ex((session), "session", sizeof("session") - 1, LIBSSH2_CHANNEL_WINDOW_DEFAULT, LIBSSH2_CHANNEL_PACKET_DEFAULT, NULL, 0)
LIBSSH2_API LIBSSH2_CHANNEL *libssh2_channel_direct_tcpip_ex(LIBSSH2_SESSION *session, char *host, int port, char *shost, int sport);
#define libssh2_channel_direct_tcpip(session, host, port) libssh2_channel_direct_tcpip_ex((session), (host), (port), "127.0.0.1", 22)
LIBSSH2_API LIBSSH2_LISTENER *libssh2_channel_forward_listen_ex(LIBSSH2_SESSION *session, char *host, int port, int *bound_port, int queue_maxsize);
#define libssh2_channel_forward_listen(session, port) libssh2_channel_forward_listen_ex((session), NULL, (port), NULL, 16)
LIBSSH2_API int libssh2_channel_forward_cancel(LIBSSH2_LISTENER *listener);
LIBSSH2_API LIBSSH2_CHANNEL *libssh2_channel_forward_accept(LIBSSH2_LISTENER *listener);
LIBSSH2_API int libssh2_channel_setenv_ex(LIBSSH2_CHANNEL *channel, char *varname, unsigned int varname_len, char *value, unsigned int value_len);
#define libssh2_channel_setenv(channel, varname, value) libssh2_channel_setenv_ex((channel), (varname), strlen(varname), (value), strlen(value))
LIBSSH2_API int libssh2_channel_request_pty_ex(LIBSSH2_CHANNEL *channel, char *term, unsigned int term_len, char *modes, unsigned int modes_len, int width, int height, int width_px, int height_px);
#define libssh2_channel_request_pty(channel, term) libssh2_channel_request_pty_ex((channel), (term), strlen(term), NULL, 0, LIBSSH2_TERM_WIDTH, LIBSSH2_TERM_HEIGHT, LIBSSH2_TERM_WIDTH_PX, LIBSSH2_TERM_HEIGHT_PX)
LIBSSH2_API int libssh2_channel_x11_req_ex(LIBSSH2_CHANNEL *channel, int single_connection, char *auth_proto, char *auth_cookie, int screen_number);
#define libssh2_channel_x11_req(channel, screen_number) libssh2_channel_x11_req_ex((channel), 0, NULL, NULL, (screen_number))
LIBSSH2_API int libssh2_channel_process_startup(LIBSSH2_CHANNEL *channel, const char *request, unsigned int request_len, const char *message, unsigned int message_len);
#define libssh2_channel_shell(channel) libssh2_channel_process_startup((channel), "shell", sizeof("shell") - 1, NULL, 0)
#define libssh2_channel_exec(channel, command) libssh2_channel_process_startup((channel), "exec", sizeof("exec") - 1, (command), strlen(command))
#define libssh2_channel_subsystem(channel, subsystem) libssh2_channel_process_startup((channel), "subsystem", sizeof("subsystem") - 1, (subsystem), strlen(subsystem))
LIBSSH2_API int libssh2_channel_read_ex(LIBSSH2_CHANNEL *channel, int stream_id, char *buf, size_t buflen);
#define libssh2_channel_read(channel, buf, buflen) libssh2_channel_read_ex((channel), 0, (char *)(buf), (buflen))
#define libssh2_channel_read_stderr(channel, buf, buflen) libssh2_channel_read_ex((channel), SSH_EXTENDED_DATA_STDERR, (buf), (buflen))
LIBSSH2_API int libssh2_poll_channel_read(LIBSSH2_CHANNEL *channel, int extended);
LIBSSH2_API unsigned long libssh2_channel_window_read_ex(LIBSSH2_CHANNEL *channel, unsigned long *read_avail, unsigned long *window_size_initial);
#define libssh2_channel_window_read(channel) libssh2_channel_window_read_ex((channel), NULL, NULL)
LIBSSH2_API unsigned long libssh2_channel_receive_window_adjust(LIBSSH2_CHANNEL *channel, unsigned long adjustment, unsigned char force);
LIBSSH2_API int libssh2_channel_write_ex(LIBSSH2_CHANNEL *channel, int stream_id, const char *buf, size_t buflen);
#define libssh2_channel_write(channel, buf, buflen) libssh2_channel_write_ex((channel), 0, (char *)(buf), (buflen))
#define libssh2_channel_write_stderr(channel, buf, buflen) libssh2_channel_write_ex((channel), SSH_EXTENDED_DATA_STDERR, (buf), (buflen))
LIBSSH2_API unsigned long libssh2_channel_window_write_ex(LIBSSH2_CHANNEL *channel, unsigned long *window_size_initial);
#define libssh2_channel_window_write(channel) libssh2_channel_window_write_ex((channel), NULL)
LIBSSH2_API void libssh2_channel_set_blocking(LIBSSH2_CHANNEL *channel, int blocking);
LIBSSH2_API void libssh2_channel_handle_extended_data(LIBSSH2_CHANNEL *channel, int ignore_mode);
/* libssh2_channel_ignore_extended_data() is defined below for BC with version 0.1
* Future uses should use libssh2_channel_handle_extended_data() directly
* if LIBSSH2_CHANNEL_EXTENDED_DATA_MERGE is passed, extended data will be read (FIFO) from the standard data channel
*/
/* DEPRECATED */
#define libssh2_channel_ignore_extended_data(channel, ignore) libssh2_channel_handle_extended_data((channel), (ignore) ? LIBSSH2_CHANNEL_EXTENDED_DATA_IGNORE : LIBSSH2_CHANNEL_EXTENDED_DATA_NORMAL )
#define LIBSSH2_CHANNEL_FLUSH_EXTENDED_DATA -1
#define LIBSSH2_CHANNEL_FLUSH_ALL -2
LIBSSH2_API int libssh2_channel_flush_ex(LIBSSH2_CHANNEL *channel, int streamid);
#define libssh2_channel_flush(channel) libssh2_channel_flush_ex((channel), 0)
#define libssh2_channel_flush_stderr(channel) libssh2_channel_flush_ex((channel), SSH_EXTENDED_DATA_STDERR)
LIBSSH2_API int libssh2_channel_get_exit_status(LIBSSH2_CHANNEL* channel);
LIBSSH2_API int libssh2_channel_send_eof(LIBSSH2_CHANNEL *channel);
LIBSSH2_API int libssh2_channel_eof(LIBSSH2_CHANNEL *channel);
LIBSSH2_API int libssh2_channel_close(LIBSSH2_CHANNEL *channel);
LIBSSH2_API int libssh2_channel_wait_closed(LIBSSH2_CHANNEL *channel);
LIBSSH2_API int libssh2_channel_free(LIBSSH2_CHANNEL *channel);
LIBSSH2_API LIBSSH2_CHANNEL *libssh2_scp_recv(LIBSSH2_SESSION *session, const char *path, struct stat *sb);
LIBSSH2_API LIBSSH2_CHANNEL *libssh2_scp_send_ex(LIBSSH2_SESSION *session, const char *path, int mode, size_t size, long mtime, long atime);
#define libssh2_scp_send(session, path, mode, size) libssh2_scp_send_ex((session), (path), (mode), (size), 0, 0)
LIBSSH2_API int libssh2_base64_decode(LIBSSH2_SESSION *session, char **dest, unsigned int *dest_len, char *src, unsigned int src_len);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* LIBSSH2_H */